DTC P0668

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0668 has not failed this ignition cycle.

DTC P0669

The transmission output shaft speed is greater than 200 RPM for greater than 200 seconds.
The TCC slip speed is equal to or greater than 120 RPM for 200 seconds or greater.
DTC P0669 has not failed this ignition cycle.